692  
FNCA52 TJSJ 220937  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
537 AM AST MON JUL 22 2019  
   
DISCUSSION
 
 
AN INCREASE IN LOW-LEVEL MOISTURE THIS MORNING IS YIELDING  
SHOWERS ACROSS THE CARIBBEAN AND ATLANTIC WATERS. THIS ACTIVITY  
IS FORECAST TO MOVE ACROSS PORTIONS OF THE SOUTHERN COASTAL  
PLAINS, AND SOUTHERN HILLS THIS MORNING. ALSO, EAST TO SOUTHEAST  
WINDS OF 15 TO 20 KTS WILL KEEP RELATIVE HUMIDITY VALUES ABOVE  
THRESHOLD TODAY. RELATIVE HUMIDITY VALUES WILL RANGE FROM THE  
MIDDLE 50'S TO LOWER 60S. ALTHOUGH KBDI VALUES CONTINUE ABOVE  
CRITICAL THRESHOLDS BETWEEN 720-760, LOW FIRE DANGER CONDITIONS  
ARE EXPECTED TODAY.  
 
PRZ014-230945-  
SOUTHEAST COASTAL PLAINS-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 30 50  
TEMP (24H TREND) 91 (+2) 70 (-4) 94  
RH % (24H TREND) 48 (-9) 96 (+8) 47  
20FTWND-VAL/AM(MPH) E 7 E 9  
20FTWND-RDG/PM(MPH) SE 11 E 7 E 12  
MIXING HGT(FT-AGL/MSL)5000 4000  
TRANSPORT WND (MPH) E 16 E 20  
VENT RATE (KT-FT) 73000 76000  
DISPERSION 5 5  
DSI 6 5 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-230945-  
SOUTHERN HILLS-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 20 50  
TEMP (24H TREND) 90 (+2) 70 (-4) 94  
RH % (24H TREND) 48 (-9) 93 (+11) 47  
20FTWND-VAL/AM(MPH) E 6 E 8  
20FTWND-RDG/PM(MPH) SE 9 E 6 E 11  
MIXING HGT(FT-AGL/MSL)5000 4500  
TRANSPORT WND (MPH) E 15 E 21  
VENT RATE (KT-FT) 65000 85500  
DISPERSION 5 5  
DSI 5 3 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-230945-  
NORTH COASTAL PLAINS-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 60 20 50  
TEMP (24H TREND) 92 (+3) 72 (-4) 92  
RH % (24H TREND) 51 (-10) 98 (+12) 55  
20FTWND-VAL/AM(MPH) E 7 E 8  
20FTWND-RDG/PM(MPH) E 10 E 8 E 11  
MIXING HGT(FT-AGL/MSL)5500 5000  
TRANSPORT WND (MPH) E 14 SE 18  
VENT RATE (KT-FT) 70264 80044  
DISPERSION 5 5  
DSI 6 5 6  
LAL 3 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ017-230945-  
NORTHERN HILLS-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER MCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 80 10 80  
TEMP (24H TREND) 91 (+2) 71 (-4) 93  
RH % (24H TREND) 50 (-8) 96 (+14) 50  
20FTWND-VAL/AM(MPH) E 5 E 5  
20FTWND-RDG/PM(MPH) E 7 E 5 E 8  
MIXING HGT(FT-AGL/MSL)5500 5000  
TRANSPORT WND (MPH) E 12 SE 17  
VENT RATE (KT-FT) 70835 76500  
DISPERSION 5 5  
DSI 6 3 6  
LAL 3 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-230945-  
WEST COAST-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 0 60  
TEMP (24H TREND) 93 (+2) 72 (-2) 94  
RH % (24H TREND) 44 (-10) 94 (+8) 47  
20FTWND-VAL/AM(MPH) E 5 E 7  
20FTWND-RDG/PM(MPH) E 6 E 6 E 8  
MIXING HGT(FT-AGL/MSL)4500 4500  
TRANSPORT WND (MPH) E 12 SE 16  
VENT RATE (KT-FT) 67500 86978  
DISPERSION 5 5  
DSI 6 4 6  
LAL 3 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ019-230945-  
EASTERN INTERIOR-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 50 50 60  
TEMP (24H TREND) 90 (+2) 70 (-5) 93  
RH % (24H TREND) 49 (-8) 96 (+12) 49  
20FTWND-VAL/AM(MPH) E 7 SE 9  
20FTWND-RDG/PM(MPH) SE 9 E 6 E 11  
MIXING HGT(FT-AGL/MSL)5500 4500  
TRANSPORT WND (MPH) SE 15 SE 21  
VENT RATE (KT-FT) 76769 85500  
DISPERSION 5 5  
DSI 6 4 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-230945-  
LUQUILLO MOUNTAIN RANGE-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 50 80 80  
TEMP (24H TREND) 88 (+4) 68 (-5) 90  
RH % (24H TREND) 51 (-9) 94 (+12) 53  
20FTWND-VAL/AM(MPH) E 8 E 11  
20FTWND-RDG/PM(MPH) E 10 E 7 E 13  
MIXING HGT(FT-AGL/MSL)4500 4000  
TRANSPORT WND (MPH) SE 15 SE 22  
VENT RATE (KT-FT) 58500 77501  
DISPERSION 5 5  
DSI 6 5 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ023-230945-  
CENTRAL MOUNTAIN RANGE-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 70 0 80  
TEMP (24H TREND) 90 (+4) 67 (-4) 93  
RH % (24H TREND) 50 (-9) 93 (+9) 49  
20FTWND-VAL/AM(MPH) LGT/VAR E 5  
20FTWND-RDG/PM(MPH) LGT/VAR LGT/VAR SE 6  
MIXING HGT(FT-AGL/MSL)5500 5500  
TRANSPORT WND (MPH) SE 13 SE 20  
VENT RATE (KT-FT) 71222 97222  
DISPERSION 5 5  
DSI 5 2 5  
LAL 3 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-230945-  
CAYEY MOUNTAIN RANGE-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 60 70  
TEMP (24H TREND) 88 (+2) 69 (-4) 90  
RH % (24H TREND) 52 (-6) 94 (+11) 52  
20FTWND-VAL/AM(MPH) E 7 E 9  
20FTWND-RDG/PM(MPH) E 9 E 6 E 11  
MIXING HGT(FT-AGL/MSL)5000 4000  
TRANSPORT WND (MPH) E 15 E 21  
VENT RATE (KT-FT) 70000 76000  
DISPERSION 5 5  
DSI 6 5 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-230945-  
VIEQUES-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE TSTMS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 80 80  
TEMP (24H TREND) 90 (+3) 77 (-1) 91  
RH % (24H TREND) 54 (-8) 91 (+6) 56  
20FTWND-VAL/AM(MPH) E 13 E 17  
20FTWND-RDG/PM(MPH) E 12 E 13 E 16  
MIXING HGT(FT-AGL/MSL)3500 3000  
TRANSPORT WND (MPH) E 18 E 24  
VENT RATE (KT-FT) 52500 64874  
DISPERSION 5 5  
DSI 6 6 6  
LAL 2 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ026-230945-  
CULEBRA-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 70 50  
TEMP (24H TREND) 90 (+3) 80 (0) 92  
RH % (24H TREND) 57 (-8) 86 (+4) 55  
20FTWND-VAL/AM(MPH) E 14 E 18  
20FTWND-RDG/PM(MPH) E 13 E 14 E 16  
MIXING HGT(FT-AGL/MSL)3000 3500  
TRANSPORT WND (MPH) E 20 E 22  
VENT RATE (KT-FT) 50718 66483  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ027-230945-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 10 50  
TEMP (24H TREND) 92 (+1) 71 (-4) 94  
RH % (24H TREND) 47 (-7) 91 (+6) 47  
20FTWND-VAL/AM(MPH) E 8 E 11  
20FTWND-RDG/PM(MPH) SE 11 E 9 SE 14  
MIXING HGT(FT-AGL/MSL)5000 4000  
TRANSPORT WND (MPH) E 18 E 23  
VENT RATE (KT-FT) 73778 80000  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-230945-  
SAINT THOMAS AND SAINT JOHN-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 50 50 30  
TEMP (24H TREND) 91 (+3) 78 (-1) 93  
RH % (24H TREND) 54 (-7) 87 (+5) 53  
20FTWND-VAL/AM(MPH) E 14 E 18  
20FTWND-RDG/PM(MPH) E 13 E 15 E 16  
MIXING HGT(FT-AGL/MSL)3500 3500  
TRANSPORT WND (MPH) E 20 E 24  
VENT RATE (KT-FT) 59500 75410  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 
VIZ002-230945-  
ST CROIX-  
537 AM AST MON JUL 22 2019  
 
TODAY TONIGHT TUE  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 40 40 30  
TEMP (24H TREND) 90 (+1) 76 (-1) 90  
RH % (24H TREND) 54 (-6) 93 (+8) 57  
20FTWND-VAL/AM(MPH) E 13 E 17  
20FTWND-RDG/PM(MPH) E 13 E 12 E 15  
MIXING HGT(FT-AGL/MSL)4500 4000  
TRANSPORT WND (MPH) E 18 E 25  
VENT RATE (KT-FT) 73500 87635  
DISPERSION 5 5  
DSI 6 6 6  
LAL 1 1 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 

 
 
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